NZ726160A - Method for transferring bottom labels and wraparound labels into an injection mould and device, suitable for this purpose, for producing injection-moulded parts provided with bottom labels and wraparound labels - Google Patents
Method for transferring bottom labels and wraparound labels into an injection mould and device, suitable for this purpose, for producing injection-moulded parts provided with bottom labels and wraparound labels Download PDFInfo
- Publication number
- NZ726160A NZ726160A NZ726160A NZ72616015A NZ726160A NZ 726160 A NZ726160 A NZ 726160A NZ 726160 A NZ726160 A NZ 726160A NZ 72616015 A NZ72616015 A NZ 72616015A NZ 726160 A NZ726160 A NZ 726160A
- Authority
- NZ
- New Zealand
- Prior art keywords
- insert die
- label
- end side
- mould cavity
- moulding tool
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002347 injection Methods 0.000 title claims abstract description 10
- 239000007924 injection Substances 0.000 title claims abstract description 10
- 238000000465 moulding Methods 0.000 claims abstract description 121
- 239000004033 plastic Substances 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 239000013013 elastic material Substances 0.000 claims description 3
- 238000001746 injection moulding Methods 0.000 abstract description 9
- 238000012546 transfer Methods 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 6
- 238000000151 deposition Methods 0.000 description 5
- 238000004806 packaging method and process Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000002372 labelling Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/008—Handling preformed parts, e.g. inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/002—Joining methods not otherwise provided for
- B29C65/008—Joining methods not otherwise provided for making use of electrostatic charges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14008—Inserting articles into the mould
- B29C2045/14057—Inserting articles into the mould feeding inserts wrapped on a core
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14106—Positioning or centering articles in the mould using electrostatic attraction or static electricity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14155—Positioning or centering articles in the mould using vacuum or suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
- B29C2045/14918—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling
- B29C2045/14926—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling multiple labels in the same cavity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/744—Labels, badges, e.g. marker sleeves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Robotics (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Making Paper Articles (AREA)
Abstract
A method is proposed for transferring a bottom label and a wraparound label into an injection mould for producing an injection-moulded part provided with the labels, in that the bottom label is arranged on the end side and the wraparound label on the lateral side of an insert die and the insert die equipped with the two labels is introduced into the mould cavity of the moulding tool, after which the bottom label is deposited on the bottom and the wraparound label on the lateral surface of the mould cavity of the moulding tool, in order to back-mould them with a plastics material injected into the mould cavity. According to the invention, the method comprises the following steps of: - providing an insert die, the end side of which has a central portion and a circumferential portion adjoining the central portion radially on the outside, wherein the central portion protrudes further in the direction of the free end of the insert die in the axial direction of the latter than the circumferential portion, such that the cross section of the insert die narrows in the direction of its free end, at least in the circumferential portion of its end side; - applying the bottom label both to the central portion and to the circumferential portion of the end side of the insert die and applying the wraparound label to the lateral side thereof such that the wraparound label projects beyond the end, facing the end side, of the lateral side of the insert die in the direction of the free end thereof; - introducing the insert die equipped with the two labels into the mould cavity of the moulding tool; - detaching the wraparound label from the lateral side of the insert die and applying same at least to the lateral surface of the mould cavity of the moulding tool; - detaching the bottom label from the end side of the insert die and applying same to the bottom of the mould cavity of the moulding tool, wherein the peripheral region of the bottom label is turned down from the circumferential portion of the end side of the insert die onto the bottom of the mould cavity of the moulding tool, such that it internally overlaps the edge, facing it, of the wraparound label; and - extracting the insert die from the mould cavity of the moulding tool. The invention also relates to an injection-moulding device, suitable for carrying out such a method, having an insert die of the abovementioned type.
Description
341 / Teal
Method for Transferring Bottom Labels and Wraparound Labels into an Injection Mould
and Device, Suitable for this Purpose, for Producing Injection-Moulded Parts Provided
with Bottom Labels and Wraparound Labels
The invention relates to a method for transferring a bottom label and a wraparound label
into an injection mould for producing an injection-moulded part provided with the bottom
label and with the wraparound label, in particular in the form of a container, in that the
bottom label is arranged on the end side of an insert die and the wraparound label on the
lateral side of an insert die, and the insert die equipped with both the bottom label and with
the wraparound label is introduced into the mould cavity of a moulding tool, after which the
bottom label is deposited on the bottom of the mould cavity of the moulding tool and the
wraparound label is deposited on the lateral surface of the mould cavity of the moulding
tool in order to back-mould them with a plastics material. The invention further relates to a
device that is particularly suitable for carrying out such a method, for producing an
injection-moulded part provided with a bottom label and with a wraparound label, in
particular in the form of a container, with a moulding tool that has a mould cavity
comprising a bottom and a lateral surface and with an insert die that can be introduced into
the mould cavity of the moulding tool and which has an end side which is suitable for
applying the bottom label to the latter, and with a lateral side which is suitable for applying
the wraparound label to the latter.
In many cases it is desirable to provide plastic moulded parts produced by injection
moulding, such as for example containers used for the packaging of everyday and luxury
food products and the like, with both a bottom and a wraparound label. The latter can
serve, e.g. in the manner of a barrier layer, to increase the diffusion density of the plastic
container or also purely as a base for printed text identifying the packaged item so that it is
not necessary to subsequently apply labels to the finished moulded part. The production of
injection-moulded parts provided with labels of this type generally takes place by the label
being introduced into the mould cavity of an injection moulding tool, after which it is back-
moulded with the plasticized plastic material. After the plastic material has solidified, the
injection-moulded part to which the label permanently adheres can be removed from the
moulding tool. Such methods are also referred to as “IML (In-Mould-Labeling) methods”.
If the moulded part is to be provided with a bottom label as well as with a wraparound
label, as is often the case in particular with packaging containers in the form of cups, bowls
or the like, the precise positioning of the labels in the mould cavity of the moulding tool
proves to be relatively complicated. For this purpose, it is generally first of all the bottom
label that is applied to the bottom of the mould cavity, and then the wraparound label is
applied to the lateral surface of the mould cavity of the moulding tool, and this often takes
place by means of an insert die which is shaped so as to complement the mould cavity of
the moulding tool, and for this reason enables precise positioning of the respective label.
However, it proves to be particularly disadvantageous that in order to insert the bottom and
the wraparound label into the moulding tool one after the other in this way, two punching
strokes are required which in addition, respectively, on the one hand require application of
the bottom label, and on the other hand application of the wraparound label to the end side
or to the lateral side of the insert die by appropriate transfer devices. Consequently, in this
way only comparably poor cycle times can be achieved.
The same applies to the method known from JP 2012-091850 A for producing an
injection-moulded packaging container that is provided with a wraparound label and with a
bottom label overlapping the latter internally and adhered to it in the overlap region.
According to the production method the flat wraparound label, the length of which is
greater than the circumference of the lateral surface of the container to be coated with the
latter, is first of all bent into a cylinder and the cylindrically bent wraparound label is applied
to the circumferential surface of an open moulding tool so that it adjoins a protrusion on
the bottom of the moulding tool, and its cylindrical bent sides facing one another overlap
due to the length of the wraparound label being greater than the circumference of the
container. The bottom label is then applied to the bottom of the moulding tool by means of
a die such that the circumferential region of the bottom label overlaps the lower portion of
the wraparound label facing it on the inside, the bottom label being adhered to the
wraparound label in this overlap region. A fusible thermoplastic is then injected into the
moulding tool in order to back-mould the bottom and the wraparound label such as to form
the finished container.
US 5 053 101 A describes a generic device for producing injection-moulded parts in the form
of containers that are provided with a bottom label as well as with a wraparound label. The
device comprises an insert die with a planar end side and an approximately cylindrical or
slightly conical lateral side which are shaped complementarily in relation to the mould
cavity of an injection-moulding tool. The insert die is equipped both on the end side and on
the lateral side with suction devices which serve to equip the insert die at the same time
with both a bottom and with a wraparound label which are removed from a respective
magazine by appropriate transfer devices. In this way it is possible to transfer both labels
into the mould cavity of the moulding tool and to apply them here with a single stamping
stroke. However, it is a particular disadvantage of this type of device on the one hand that
covering of the entire surface of the moulded part with the bottom label and the
wraparound label cannot be achieved because a collision occurs in the region where the
two labels come into contact, at the latest when depositing said labels in the mould cavity of
the moulding tool, unless the dimensions of the two labels are chosen such that a gap
remains between them. However, not only is this gap visible, and so unattractive, on the
finished moulded part, but it may also lead to the plasticized plastic material passing
between the two labels onto the (subsequently) outer side of the moulded part during the
back-moulding of the labels, and this in turn results in a considerable amount of waste.
Similar methods for producing a packaging container provided with a bottom label as well
as with a wraparound label can be gathered from JP 2014-046979 A, once again on the one
hand the flat wraparound label having a length which is greater than the circumference of
the lateral surface of the container to be coated with said label so that its ends facing one
another overlap when it has been bent into a cylinder and has been applied to the
circumferential surface of an open moulding tool. On the other hand the bottom label has a
larger circumference than the bottom of the container so that the latter overlaps the
wraparound label at the edge. The introduction of the bottom label and the wraparound
label into the injection-moulding tool takes place either – similarly to the aforementioned
JP 2012-091850 A – one after the other by means of one or more dies that can be
introduced into the tool and to which negative pressure is applied, or – similarly to
US 5 053 101 A described above – both the bottom label and the wraparound label are
applied to one and the same die and are transferred into the moulding tool at the same
time, the problem mentioned above in connection with US 5 053 101 A of a collision
between the two labels then occurring once again at the latest when they are deposited
together in the moulding tool so that they can then be back-moulded with a plasticized
plastic.
One can gather from EP 2 332 712 B1 a method for the insertion of a bottom label and a
wraparound label into the mould cavity of an injection-moulding tool and an insert die
appropriate for this purpose, which overcome the aforementioned problem by the two
labels overlapping one another being deposited in the mould cavity by means of a single
punching stroke. In this connection the bottom label in particular is placed in the mould
cavity such that it overlaps the circumferential edge of the wraparound label facing it at the
edge on the inside so that not only is it possible to cover the entire surface of the
injection-moulded part with the label, but also when injecting the plasticized plastic
material into the mould cavity of the moulding tool, first of all the bottom label is
back-moulded, and then the molten plastic comes into contact with the wraparound label
beyond the bottom label so that the wraparound label is also back-moulded. In this way the
molten plastic can be reliably prevented from passing between the labels onto the
(subsequently) outer and visible side of the moulded part. A disadvantage, however, is the
extreme complexity of the insert die which has an outer die for receiving the wraparound
label and an inner die for receiving the bottom label, the inner die being axially displaceable
relative to the outer die. Both die parts have a shape that is complementary to the mould
cavity of the moulding tool, the inner die in turn having a planar end side for receiving the
bottom label, and the outer die having an approximately cylindrical or slightly conical lateral
side for receiving the wraparound label. Moreover, both die parts are provided with suction
devices. The insertion of the insert die equipped both with a bottom label and with a
wraparound label takes place by means of a single punching stroke, but after introducing
the insert die into the mould cavity of the moulding tool the wraparound label must first of
all be deposited on the lateral surface of the mould cavity, after which the inner die
provided with the bottom label must be moved out of the outer die so as to also deposit the
bottom label on the bottom of the mould cavity such that it overlaps the (lower) edge of the
wraparound label facing it on the inside. This can likewise lead to extended cycle times.
Therefore, the object of the invention is to further develop a method for transferring a
bottom label as well as a wraparound label into an injection mould in order to produce an
injection-moulded part provided with the bottom label and with the wraparound label of
the type specified at the start as well as a device, particularly suitable for implementing such
a method, for producing an injection-moulded part of the type specified at the start
provided with a bottom label and with a wraparound label easily and inexpensively, such
that the aforementioned disadvantages can at least partially be overcome while
guaranteeing the fastest possible cycle times.
From a technical point of view, this object is achieved by a method of the type specified at
the start which comprises the following steps:
- providing an insert die, the end side of which has a central portion and a
circumferential portion adjoining the central portion radially on the outside, wherein
the central portion protrudes further in the direction of the free end of the insert die
in the axial direction of the latter than the circumferential portion, such that the
cross-section of the insert die narrows in the direction of its free end, at least in the
circumferential portion of its end side;
- applying the bottom label both to the central portion and to the circumferential
portion of the end side of the insert die and applying the wraparound label to the
lateral side of the insert die such that the wraparound label projects beyond the end,
facing the end side of the insert die, of the lateral side of the insert die in the
direction of the free end thereof;
- introducing the insert die equipped with the bottom label and with the wraparound
label into the mould cavity of the moulding tool;
- detaching the wraparound label from the lateral side of the insert die and applying
the same at least to the lateral surface of the mould cavity of the moulding tool;
- detaching the bottom label from the end side of the insert die and applying the same
to the bottom of the mould cavity of the moulding tool, wherein the peripheral
region of the bottom label is turned down from the circumferential portion of the
end side of the insert die onto the bottom of the mould cavity of the moulding tool,
such that it internally overlaps the edge, facing it, of the wraparound label; and
- extracting the insert die from the mould cavity of the moulding tool.
In order to resolve the problem underlying the invention, with a device of the type specified
at the start the invention makes provision, moreover, such that the end side of the insert
die has a central portion and a circumferential portion adjoining the central portion radially
on the outside, wherein the central portion protrudes further in the direction of the free
end of the insert die in the axial direction of the latter than the circumferential portion, such
that the cross-section of the insert die narrows in the direction of its free end, at least in the
circumferential portion.
The design of the invention makes it possible, with an insert die designed to be very simple
and inexpensive, robust and not requiring maintenance, to transfer both the bottom label
and the wraparound label into the moulding tool by means of a single punching stroke,
while at the same time guaranteeing precise positioning, the label then being able to be
back-moulded such as to form the plastic moulded part. Due to the backward offset on the
circumference side of the end side of the insert die receiving the bottom label with respect
to the central portion of the end side of the insert die, at least the circumferential edge of
the bottom label is reshaped upwardly if it is applied to the end side of the insert die. In this
way, any collision with the wraparound label is reliably prevented, which wraparound label
is on its part applied to the lateral side of the insert die such that it projects downwards
over the latter, i.e. in the direction of the end side, free end of the insert die. Consequently,
upon introducing the insert die equipped both with the bottom label and with the
wraparound label into the mould cavity of the moulding tool, the wraparound label passes
into the desired position on the lateral surface of the mould cavity, its lower, free edge
passing downwards along the lateral surface of the mould cavity of the moulding tool,
possibly to the circumferential edge of the bottom of the mould cavity (depending on how
far the lower edge of the wraparound label projects downwardly over the lateral side of the
insert die in the direction of its free end) and is thus located beneath the bottom label, the
circumferential edge of which, being bent upwards, rests against the circumferential portion
of the end side of the insert die. If the labels are now detached from the insert die, the
circumferential edge of the bottom label turns downwards from the circumferential portion
of the end side of the insert die towards the bottom of the mould cavity of the moulding
tool and thus automatically overlaps the (lower) circumferential edge of the wraparound
label on the inside of the mould cavity so that covering of the whole surface of the moulded
part can be achieved without a gap being formed between the two labels through which the
plasticized polymer could pass after being injected into the mould cavity. Due to the overlap
on the inside (i.e. in the finished moulded part the edge of the wraparound label facing the
bottom label lies above the edge of the bottom label facing the wraparound label on the
bottom label), during the normal injection of the molten plastic into a central bottom region
of the mould cavity of the moulding tool it is furthermore ensured that the plasticized
polymer can flow beyond the labels resting against one another peripherally without
passing between the labels.
In an advantageous embodiment of the method according to the invention provision can be
made such that the wraparound label is applied to the lateral side of the insert die such that
it projects over its lateral side in the direction of the free end of the insert die by a distance
that corresponds at least to the axial offset between the central portion of the end side of
the insert die protruding the furthest in the axial direction in the direction of the free end of
the insert die and the outer circumference of the circumferential portion of the end side of
the insert die or at least slightly exceeds this axial offset. In this way a sufficiently
overlapping arrangement of the bottom label on the inside of the mould cavity of the
moulding tool above the wraparound label is guaranteed, the desired degree of overlapping
basically being pre-set easily by the protrusion with which the wraparound label projects
over the lateral side of the insert die in the direction of its end side free end when it is
applied to the lateral side of the insert die.
The bottom label should preferably be applied substantially to the entire end side of the
insert die, including its circumferential portion, it having to be applied at least over a
circumferential part of the circumferential portion of the insert die in order to be deformed
upwardly and in order to be able to be “turned downwards” when inserted into the mould
cavity of the moulding tool. However, even when the bottom label is somewhat smaller
than the entire end side of the insert die and only extends over part of its receding
circumferential section, this can be compensated by a further protrusion of the wraparound
label from the lateral side of the insert die in the direction of the end side without
necessarily having to use an insert die with a different geometry. In this case the overlap
region of the labels “migrates” from a lower lateral portion of the moulded part in the
direction of its bottom. Consequently, a single insert die can be used for similar blanks of
the bottom label and the wraparound label.
As regards the design of the moulding tool of a device according to the invention, the
bottom of the mould cavity of the moulding tool can have, for example, a substantially
planar extension, as is normal in particular in the case of producing injection-moulded
containers in order to provide good stability of the containers. Instead, however, it is of
course also possible – in so far as is desired – for the bottom of the mould cavity of the
moulding tool on its part to be made, for example, in the form of a trough and to have a
circumferential region extending from a central region on the circumferential side obliquely
upwards, one only needing to ensure that the axial distance between the lowest point of
the central region of the bottom of the mould cavity and the outer circumference of its
circumferential region is smaller than the axial offset between the central portion of the end
side of the insert die protruding the furthest in the axial direction in the direction of the free
end of the insert die and the outer circumference of the circumferential portion of the end
side of the insert die, so that the bottom label can be “turned downwards” onto the bottom
of the mould cavity and overlapping the wraparound label on the periphery when
depositing it on the bottom of the mould cavity on the circumferential side of the
circumferential portion of the end side of the insert die. In other words, any curvature or
conicity of the bottom of the mould cavity of the moulding tool must be smaller than the
curvature or conicity of the end side of the insert die.
Moreover, it can prove to be advantageous if the cross-over between the lateral surface of
the mould cavity of the moulding tool and its bottom are rounded, the rounding having in
particular a radius of at least 1 mm, preferably of at least 2 mm. In this way it is easily
possible to push the wraparound label over the lateral surface of the mould cavity into a
circumferential portion of the bottom of the mould cavity of the moulding tool with its edge
facing the bottom label (projecting over the lateral side of the insert die) depending on the
desired protrusion with which it has been applied to the lateral side of the insert die
projecting in the direction of its end side, free end, it being able to be reshaped or bent
cleanly along the rounded cross-over between the lateral surface and the bottom of the
mould cavity without striking the bottom and blocking or being damaged here.
As regards the geometric design of the insert die, first of all its lateral side can be formed in
a known way to be substantially complementary to the lateral surface of the mould cavity of
the moulding tool so as to provide simple and precise positioning of the wraparound label in
the mould cavity when the latter is deposited. The lateral side of the insert die can basically
be of practically any form here and e.g. be substantially in the form of a cylinder jacket (not
necessarily circular cylindrical), its cross-section in the region of its lateral side being able to
be made to be e.g. circular, oval, polygonal or the like, and being able to narrow at least
slightly in particular in the direction of its end side in order to provide simple de-moulding of
the finished moulded part in the conventional manner.
The end side of the insert die, which according to the invention has a central portion and a
circumferential portion adjoining the central portion radially on the outside, the central
portion protruding further in the axial direction of the insert die in the direction of its free
end than the circumferential portion so that the cross-section of the insert die narrows in
the direction of its free end, at least in the circumferential portion of its end side, can, for
example, be substantially convexly curved and have a flowing cross-over of its central
portion into its circumferential portion. Instead, it can also be advantageous if the central
region of the end side of the insert die is substantially planar in form (in this respect e.g.
approximately complementary to the corresponding bottom portion of the mould cavity of
the moulding tool if the insert die has been shifted into the latter), and the circumferential
portion adjoining the latter radially on the outside narrows substantially conically or is
curved convexly. Needless to say, other configurations are conceivable provided the cross-
section of the insert die narrows in the direction of its free end, at least in the
circumferential portion of its end side, so that the end side of the insert die recedes on the
circumferential side in relation to its central portion.
As known as such from the prior art mentioned at the start, in an advantageous
embodiment of the method according to the invention provision can be made such that in
order to apply the bottom label to the end side of the insert die, said bottom label is sucked
at least onto the circumferential portion of the end side of the insert die, in particular both
onto the circumferential portion and onto the central portion of the end side of the insert
die. Moreover, in order to apply the wraparound label to the lateral side of the insert die,
said wraparound label can be sucked onto the lateral side of the insert die so that the insert
die can carry both the bottom label and the wraparound label at the same time securely
and undisplaceably in order to deposit them in the mould cavity of the moulding tool.
Moreover, in an advantageous embodiment provision can be made such that in order to
deposit the bottom label on the bottom of the mould cavity of the moulding tool and to
turn down its peripheral region from the circumferential portion of the end side of the
insert die onto the bottom of the mould cavity, the suction pressure is discontinuous or the
bottom label is exposed to positive pressure, in particular slight positive pressure, at least
on the circumferential portion of the end side of the insert die, in particular both on the
circumferential portion and on the central portion of the end side of the insert die.
Accordingly, in order to deposit the wraparound label on the lateral surface of the mould
cavity of the moulding tool the suction pressure can preferably also be interrupted or the
wraparound label can additionally be exposed to positive pressure, in particular slight
positive pressure, in order to enable problem-free detachment of the labels from the insert
die and depositing of the same at the intended position in the mould cavity of the moulding
tool.
Alternatively or in addition to the latterly specified embodiment, provision can preferably
be made, moreover, such that in order to deposit the bottom label on the bottom of the
mould cavity of the moulding tool and to turn down its peripheral region from the
circumferential portion of the end side of the insert die onto the bottom of the mould
cavity, and/or in order to deposit the wraparound label on the lateral surface of the mould
cavity of the moulding tool, the bottom label and/or the wraparound label is or are sucked
onto the wall of the mould cavity of the moulding tool or is or are drawn electrostatically
onto the wall of the mould cavity of the moulding tool. This can be advantageous, not only
for the purpose of correct and precise transfer of the labels from the insert die to the mould
cavity of the moulding tool, but also with regard to holding of the label or labels precisely in
position and without slipping while injecting the plasticized plastic into the mould cavity of
the moulding tool, during which the sucking or the electrostatic drawing of the label or
labels onto the wall of the moulding tool delimiting the mould cavity in particular can be
maintained. In the first-specified case the moulding tool can be equipped with negative
pressure openings opening out into its mould chamber; in the latterly-specified case, the
respective label, e.g. before applying to the insert die or in particular in the state already
applied to the insert die, can be electrostatically charged and/or it is electrostatically
charged in the mould cavity of the moulding tool so that, as a result of the electric potential
difference it is “adhered” to the wall(s) of the moulding tool delimiting the mould chamber.
From a technical point of view, provision can consequently be made in an advantageous
embodiment such that
- at least the circumferential portion of the end side of the insert die, in particular
both the circumferential portion and the central portion of the end side of the insert
die, and/or
- the lateral side of the insert die
is/are provided with suction openings which can be connected to a negative pressure
generator. In this connection e.g. the suction openings of the end side of the insert die or
the suction openings of the lateral side of the insert die can open out into a common or into
a respective suction channel of the insert die which can be (respectively) connected to the
negative pressure generator.
In this connection the negative pressure generated by the negative pressure generator can
advantageously be switched on or off in order to be able to detach the label or labels
without any problem from the insert die and to deposit it or them in the mould cavity of the
moulding tool. Moreover, the negative pressure generator can also be designed in particular
to generate a positive pressure that can likewise be switched on or off so that the label or
labels can be reliably detached from the insert die upon depositing them in the mould cavity
of the moulding tool.
While basically any geometric configuration of the suction openings is possible, it may also
prove to be advantageous if at least some suction openings extend substantially in slot form
over at least part of the circumferential portion of the end side of the insert die from the
central portion of the end side of the insert die with the radial extension direction
component on the outside so that the circumferential region of the bottom label rests
correctly against the circumferential portion of the end side of the insert die towards the
top if the bottom label is applied to the end side of the insert die and both labels are
transferred into the mould cavity of the moulding tool.
Moreover, it may be advantageous if at least one bottom label, in particular both a bottom
label and a wraparound label, made of a flexibly elastic material is or are used. This
configuration may be particularly advantageous for the bottom label, the circumferential
side peripheral region of which, due to its elastic resilience, automatically turns downwards
into an approximately planar extension in the direction of the bottom of the mould cavity of
the moulding tool if it is detached from the end side of the insert die on the circumferential
portion of which it has previously been bent upwards by elastic deformation, and is
deposited into the mould cavity of the moulding tool.
Additional features and advantages of the invention emerge from the following description
of an exemplary embodiment with reference to the drawings. These show as follows:
Fig. 1 a diagrammatic side view of an embodiment of an insert die according to the
invention;
Fig. 2 a diagrammatic top view of the lower end side in Fig. 1 of the insert die
according to Fig. 1;
Fig. 3 a diagrammatic sectional view of the insert die according to Figs. 1 and 2
along sectional plane A-A of Fig. 2;
Fig. 4 a diagrammatic detailed view of the insert die according to Fig. 1 to 3 in the
region of the cross-over of its end side and its lateral side which have been
provided with a bottom label and a wraparound label;
Fig. 5 a detailed view of the insert die corresponding to Fig. 4 after this die has been
introduced into the mould cavity of a moulding tool;
Fig. 6 a detailed view of the insert die corresponding to either of Figs. 4 and 5
immediately after depositing the bottom label and the wraparound label in
the mould cavity of the moulding tool such as to overlap one another
peripherally; and
Fig. 7 a detailed view of the moulding tool corresponding to Fig. 5 after the insert
die has been brought out of the moulding tool and the bottom label and the
wraparound label deposited in its mould cavity are back-moulded with a
plasticized plastic material injected via a mould core.
In Figs. 1 to 3 diagrammatic views of an embodiment, provided as a whole with reference
number 1, of an insert die of a device according to the invention for producing an
injection-moulded part provided with a bottom label 2 (see Figs. 4 to 7) and with a
wraparound label 3 (see also Figs. 4 to 7) in the form of a container, such as a cup, are
reproduced. The device that works according to the “In Mould Labelling” method further
comprises a moulding tool 4 that is not shown in Figs. 1 to 3 (see once again Figs. 4 to 7), an
injection-moulding machine assigned to the moulding tool 4, a magazine in each case for
storage of the bottom 2 and wraparound labels 3 (see Figs. 4 to 7), as well as appropriate
transfer devices for transferring the labels 2, 3 from the respective magazines to the insert
die 1. The injection-moulding machine, the magazines and the transfer devices are not
shown in the drawings and are formed according to the prior art, for which reason they do
not require any further discussion. It goes without saying that the device can also comprise,
for example, a number of moulding tools 4 and a number of insert dies 1 that can be
inserted into the latter and which can, e.g. be actuated synchronously in order to be able to
produce moulded parts provided with a bottom label 2 and a wraparound label 3 at the
same time.
As can be seen from Figs. 1 to 3, the insert die 1 has an end side 10 provided for the
application of the bottom label 2 (Figs. 4 to 7) and a lateral side 11 provided for the
application of the wraparound label 3 (Figs. 4 to 7). Here the end side 10 of the insert die 1
has a central portion 10a and a circumferential portion 10b adjoining the latter radially on
the outside, the central portion 10a protruding further in the direction of the free end of the
insert die 1 (downwardly in Figs. 1 and 3) in the axial direction of the latter than the
circumferential portion 10b which recedes with respect to the latter such that the
cross-section of the insert die 1 narrows (downwardly in Figs. 1 and 3) in the direction of the
free end in the circumferential portion 10b of its end side 10. In the present exemplary
embodiment the central portion 10a of the end side 10 of the insert die 1 is, for example,
substantially planar in form and extends perpendicular to the longitudinal axis A of the
insert die 1 so that it is formed to approximately complement the bottom 4a – which is also
approximately planar here – of the mould cavity of the moulding tool 4 (Figs. 4 to 7).
However, the circumferential portion 10b of the end side 10 of the insert die 1 narrows
approximately conically, it in fact also being basically possible instead for it to be formed in
some other way, e.g. convexly curved (not shown). The angle α between the plane spanning
the central portion 10a and a straight line intersecting the longitudinal axis A and running
parallel to the circumferential portion 10b is in the present case for example approximately
° to approximately 20°, such as e.g. approximately 15° (see Fig. 1). Overall, the
circumferential portion 10b preferably extends over at least 20%, preferably over at least
%, in particular over approximately 40% to e.g. approximately 70% of the end side 10 of
the insert die (see in particular Fig. 2). In the present exemplary embodiment the lateral side
11 of the insert die 1 is approximately cylindrical to slightly conical in form, in particular it
being possible for it to be formed so as to complement the lateral surface 4b of the
moulding tool 4 which on its part extends slightly conically (Figs. 4 to 7).
As can be seen, furthermore, from Figs. 1 to 3, the lateral side 11 of the insert die 1 is
equipped with a plurality of suction openings 12 which extend, for example, in the form of
slots or oblong holes around the circumference of the lateral side 11 (see Fig. 1) and serve
to suck on the wraparound label 3 (Figs. 4 to 7). Moreover, the edge side 10 of the insert die
is provided with a plurality of suction openings 13 which extend both over the central
portion 10a and in particular over the circumferential portion 10b of the edge side 10 of the
insert die 1 (see in particular Figs. 2 and 3) and serve to suck on the bottom label 2 (Figs. 4
to 7). In the exemplary embodiment reproduced by the drawings, the suction openings 13
extend approximately in the radial direction of the end side 10 of the insert die 1 both over
its central portion 10a and over the circumferential portion 10b in order to apply the
bottom label 2 as far as possible with its entire circumferential region to the circumferential
portion 10b of the end side 10 of the insert die 1 by bending or turning down the latter, and
in this way to prevent a collision with the wraparound label 3 applied to the lateral side 11
of the insert die 1 if the wraparound label has been applied to the insert die 1. As is evident
from Figs. 2 and 3, the suction openings 12, 13 are fluidically connected by supply channels
14 running within the insert die 1, which supply channels open out, for example, into one or
more common supply channels 15 (Fig. 3), to the outer end 16 of which a negative pressure
generator (not shown) can be connected. The supply channel 15 or a line (not shown)
connecting the latter to the negative pressure generator is advantageously equipped with a
control valve (likewise not shown) in order to expose the suction openings 12, 13 optionally
to negative pressure (if the labels 2, 3 are to be applied to the insert die 1) or not (if the
labels 2, 3 are to be deposited in the mould cavity of the moulding tool 4).
Moreover, the negative pressure generator can e.g. optionally also be designed to generate
an at least slightly positive pressure in order to facilitate detachment of the labels 2, 3 when
they are deposited in the mould cavity of the moulding tool 4.
In the following an embodiment of a method according to the invention for transferring
both the bottom label 2 and the wraparound label 3 by means of the insert die according to
Figs. 1 to 3 into the moulding tool 4 formed in the manner of an injection mould in order to
produce an injection-moulded part provided with both of the labels 2, 3, in the present case
in the form e.g. of a cup-shaped container, will be explained in more detail with reference to
Figs. 4 to 7. The components of the insert die 1 are provided with the same reference
numbers in Figs. 4 to 7 and will not be described again below. It should be pointed out that
Figs. 4 to 7 are not true to scale, and in particular the thickness of the bottom label 2 and
the wraparound label 3 are shown larger than is generally the case in reality for the purpose
of better illustration.
Fig. 4 shows the situation after both the bottom label 2 and the wraparound label 3 have
been applied to the insert die 1 by these labels being removed, e.g. by means of appropriate
handling devices (not shown), from a respective magazine (not shown either) and have been
sucked onto the surfaces of the end side 10 and the lateral side 11 of the insert die 1 by
means of the suction openings 12, 13. As can be seen from Fig. 4, the bottom label 2 here is
applied substantially to the entire end side 10 of the insert die 1, i.e. both to its central
portion 10a and to the respectively receding circumferential portion 10b, the peripheral
region 2a of the bottom label 2 being bent upwards in Fig. 4 so that it rests substantially
against the circumferential portion 10b of the insert die 1. In fact, the latter also applies to
the central region 2b of the bottom label 2 which rests against the central portion 10a of the
end side 10 of the insert die 1. The wraparound label 3 is applied to the lateral side 11 of the
insert die 1, and such that its lower, free end 3a in Fig. 4, which points in the direction of the
end side 10 of the insert die 1 or in the direction of its free (lower) end, projects over the
lateral side 11 of the insert die 1 (downwards in Fig. 4). As a result, a collision of the bottom
label 2 with the wraparound label 3 is reliably avoided. The distance L by which the
wraparound label 3 projects (downwards) from the lateral side 11 of the insert die 1 or
projects over the lateral side 11 corresponds at least to or is preferably approximately more
than the axial offset V between the central portion 10a of the end side 10 of the insert die 1
protruding the furthest in the axial direction (i.e. vertically in Fig. 1) in the direction of the
free end of the insert die 1 and the outer circumference 10c of the circumferential portion
10b of the end side 10 of the insert die 1 to which its lateral side 11 adjoins in the
circumferential portion 10b of the end side 10 of the insert die 1.
Fig. 5 shows the situation in which the insert die equipped with the bottom label 2 and with
the wraparound label 3 according to Fig. 4 has been introduced into the mould cavity of the
moulding tool 4 and has reached its final position in which the labels 2, 3 are to be
deposited in the mould chamber, but by maintaining the negative pressure acting via the
suction openings 12, 13 are still (just) held on the end side 10 or the lateral side 11 of the
insert die 1. As can be seen from Fig. 5, the central region 2b of the bottom label 2 rests
substantially against the bottom 4a of the mould cavity of the moulding tool 4, while its
peripheral region 2a, bent upwards, (still) rests against the receding circumferential portion
10b of the end side 10 of the insert die. The wraparound label 3 is likewise substantially in
contact with the lateral surface 4a of the mould cavity of the moulding tool 4, the lower end
3a of the wraparound label 3 facing the bottom 4a in Fig. 5 projecting at least into the cross-
over region of the lateral surface 4b into the bottom 4a of the mould cavity of the moulding
tool 4 or – depending on the pre-set desired protrusion – e.g. also into at least the outer
circumferential region of the bottom 4a due to its protrusion over the lateral side 11 of the
insert die 1. Its free end 3a can have been bent inwardly here according to the cross-over 4c
of the lateral surface 4b into the bottom 4a of the mould cavity of the moulding tool, for
which reason this cross-over 4c preferably extends approximately consistently, and in
particular can be rounded, e.g. forming a radius of preferably approximately 1 mm to
approximately 5 mm.
Fig. 6 shows the situation in which the bottom label 2 and the wraparound label 3 have
(just) been detached from the insert die 1 and have been deposited in the mould cavity of
the moulding tool 4, which can take place one after the other or in particular
simultaneously, by the suction channels 12, 13, being separated from the negative pressure
generator, e.g. by closing the control valve, and as a result the negative or suction pressure
being interrupted. As can be seen from Fig. 6, the peripheral region 2a of the bottom label 2
is turned down here from the circumferential portion 10b of the end side 10 of the insert
die 1 (see Figs. 4 and 5) onto the bottom 4a of the mould cavity of the moulding tool 4
(downwards in Fig. 6) so that it overlaps the edge of the wraparound label 3 facing it on the
inside, and as a result the lower end 3a in Fig. 6 of the wraparound label 3 is located
between the moulding tool 4 and the outer edge portion of the bottom label 2 so that the
formation of a gap between the bottom label 2 and the wraparound label 3 in the finished
moulded part is reliably avoided. The “turning down” of the peripheral region 2a of the
bottom label 2 from the receding circumferential portion 10b of the end side 10 of the
insert die 1 onto the bottom 4a of the mould cavity of the moulding tool 4 such as to
overlap at least the end 3a of the wraparound label 2 can take place here in an
approximately planar extension purely as a result of the elastic resilience of the material of
the bottom label 2, for which reason the bottom label 2 – and optionally also the
wraparound label 3 – is preferably produced from a flexibly elastic material, for example
from a ready-printed plastic film with a higher melting point than that of the plasticized
plastic material injected into the moulding tool 4 (see with regard to this below with
reference to Fig. 7).
Alternatively, or in particular in addition, provision can however preferably be made for this
purpose such that the moulding tool 4 on its part has a plurality of negative pressure
openings opening out into the mould cavity, which are only indicated diagrammatically in
Figs. 5 to 7 by reference number 5, and at least some of which are disposed in the
peripheral circumferential region of the bottom 4 which communicates with the receding
circumferential portion 10b of the end side 10 of the insert die 1 when the latter has been
introduced into the mould cavity of the moulding tool 4. However, the negative pressure
openings 5 can advantageously be arranged both on the bottom 4a and on the lateral
surface 4b of the mould cavity of the moulding tool 4 in order to keep both the bottom label
2 and the wraparound label 3 in the precise position when they have been deposited in the
mould cavity of the moulding tool 4 and are back-moulded with the plasticized plastic
material, the negative pressure also being able to be maintained in particular during the
back-moulding. Instead of sucking the labels 2, 3 onto the walls of the mould cavity of the
moulding tool 4, it is of course also conceivable to draw the labels 2, 3 onto the walls
electrostatically (not shown).
Finally, Fig. 7 shows a situation in which the insert die 1 has been extracted from the mould
cavity of the moulding tool 1 after the bottom label 2 and the wraparound label 3 have been
deposited in the mould cavity overlapping one another peripherally. The arrangement of
the labels 2, 3 corresponds to that of Fig. 6, the labels 2, 3 in particular being held in position
at the negative pressure openings 5 by continuous application of negative pressure. As can
be seen in Fig. 7, a mould core 6 which delimits the mould cavity at the side opposite the
moulding tool 4 (the upper side in Fig. 7) has now been introduced into the mould cavity of
the moulding tool. The mould core has a (or several; not shown) injection channel/s 7 which
is connected to the injection-moulding machine (not shown) and by means of which the
plasticized plastic material is injected into the mould cavity in order to produce the moulded
part by back-moulding the bottom label 2 and the wraparound label 3. Provided, as is the
case in the present exemplary embodiment, the injection channel 7 opens out into a central
region of the bottom 4a of the mould cavity of the moulding tool 4 so that the flow paths of
the injected molten plastic are of approximately equal length in all directions, the molten
plastic is conveyed away over the bottom label 2 and the region where it overlaps the
wraparound label 3 to the inside of the wraparound label 3, as indicated by the arrows
according to Fig. 7. It can be seen that in this way the plasticized plastic material is reliably
prevented from penetrating between the region where the bottom label 2 overlaps the
wraparound label 3 and in particular the molten plastic is surely and reliably prevented from
bleeding through to the outside of the labels 2, 3 so that a moulded part covered on all
sides with the labels 2, 3 can be produced in which the cross-over between the labels 2, 3
cannot be seen and, moreover, the formation of wastage caused by this is avoided.
Claims (15)
1. A method for transferring a bottom label (2) and a wraparound label (3) into an injection mould (4) for producing an injection-moulded part provided with the bottom label (2) and with the wraparound label (3), in particular in the form of a container, in that the bottom label (2) is arranged on the end side (10) of an insert die (1) and the wraparound label (3) on the lateral side (11) of the insert die (1), and the insert die (1) equipped with both the bottom label (2) and with the wraparound label (3) is introduced into the mould cavity of a moulding tool (4), after which the bottom label (2) is deposited on the bottom (4a) of the mould cavity of the moulding tool (4) and the wraparound label (3) is deposited on the lateral surface (4b) of the mould cavity of the moulding tool (4) in order to back-mould them with a plastics material, characterized by the following steps: - providing an insert die (1), the end side (10) of which has a central portion (10a) and a circumferential portion (10b) adjoining the central portion (10a) radially on the outside, the central portion (10a) protruding further in the direction of the free end of the insert die (1) in the axial direction of the latter than the circumferential portion (10b), such that the cross-section of the insert die (1) narrows in the direction of its free end, at least in the circumferential portion (10b) of its end side (10); - applying the bottom label (2) both to the central portion (10a) and to the circumferential portion (10b) of the end side (10) of the insert die (1) and applying the wraparound label (3) to the lateral side (11) of the insert die (1) such that the wraparound label (3) projects beyond the end, facing the end side (10) of the insert die (1), of the lateral side (11) of the insert die (1) in the direction of the free end thereof; - introducing the insert die (1) equipped with the bottom label (2) and with the wraparound label (3) into the mould cavity of the moulding tool (4); - detaching the wraparound label (3) from the lateral side (11) of the insert die (1) and applying the same at least to the lateral surface (4b) of the mould cavity of the moulding tool (4); - detaching the bottom label (2) from the end side (10) of the insert die (1) and applying the same to the bottom (4a) of the mould cavity of the moulding tool (4), the peripheral region (2a) of the bottom label (2) being turned down from the circumferential portion (10b) of the end side (10) of the insert die (1) onto the bottom (4a) of the mould cavity of the moulding tool (4), such that it internally overlaps the edge (3a), facing it, of the wraparound label (3); - extracting the insert die (1) from the mould cavity of the moulding tool (4).
2. The method according to Claim 1, characterized in that the wraparound label (3) is applied to the lateral side (11) of the insert die (1) such that it projects over its lateral side (11) in the direction of the free end of the insert die (1) by a distance (L) that corresponds at least to the axial offset (V) between the central portion (10a) of the end side (10) of the insert die (1) protruding the furthest in the axial direction in the direction of the free end of the insert die (1) and the outer circumference (10c) of the circumferential portion (10b) of the end side (10) of the insert die (1) or at least slightly exceeds this axial offset (V).
3. The method according to Claim 1 or 2, characterized in that the bottom label (2) is applied substantially to the entire end side (10) of the insert die (1), including its circumferential portion (10b).
4. The method according to any of Claims 1 to 3, characterized in that - in order to apply the bottom label (2) to the end side (10) of the insert die (1) said bottom label (2) is sucked at least onto the circumferential portion (10b) of the end side (10) of the insert die (1), in particular both onto the circumferential portion (10b) and onto the central portion (10a) of the end side (10) of the insert die (1); and/or - in order to apply the wraparound label (3) to the lateral side (11) of the insert die (1), said wraparound label (3) is sucked onto the lateral side (11) of the insert die (1).
5. The method according to Claim 4, characterized in that - in order to deposit the bottom label (2) on the bottom (4a) of the mould cavity of the moulding tool (4) and to turn down its peripheral region (2a) from the circumferential portion (10b) of the end side (10) of the insert die (1) onto the bottom (4a) of the mould cavity, the suction pressure is interrupted or the bottom label (2) is exposed to positive pressure at least on the circumferential portion (10b) of the end side (10) of the insert die (1), in particular both on the circumferential portion (10b) and on the central portion (10a) of the end side (10) of the insert die (1); and/or - in order to deposit the wraparound label (3) on the lateral surface (4b) of the mould cavity of the moulding tool (4) the suction pressure is interrupted or the wraparound label (3) is additionally exposed to positive pressure.
6. The method according to any of Claims 1 to 5, characterized in that in order to deposit the bottom label (2) on the bottom (4a) of the mould cavity of the moulding tool (4) and to turn down its peripheral region (2a) from the circumferential portion (10b) of the end side (10) of the insert die (1) onto the bottom (4a) of the mould cavity, and/or in order to deposit the wraparound label (3) on the lateral surface (4b) of the mould cavity of the moulding tool (4), the bottom label (2) and/or the wraparound label (3) is or are sucked onto the wall of the mould cavity of the moulding tool (4) or is or are drawn electrostatically onto the wall of the mould cavity of the moulding tool.
7. The method according to any of Claims 1 to 6, characterized in that at least one bottom label (2), in particular both a bottom label (2) and a wraparound label (3), is/are made of a flexibly elastic material.
8. A device for producing an injection-moulded part provided with a bottom label (2) and with a wraparound label (3), in particular in the form of a container, with a moulding tool (4) with a mould cavity comprising a bottom (4a) and a lateral surface (4b) as well as with an insert die (1) that can be introduced into the mould cavity of the moulding tool (4), which insert die has an end side (10) which is suitable for applying the bottom label (2) to the latter, and with a lateral side (11) which is suitable for applying the wraparound label (3) to the latter, in particular for implementing a method according to any of Claims 1 to 7, characterized in that the end side (10) of the insert die (1) has a central portion (10a) and a circumferential portion (10b) adjoining the central portion (10a) radially on the outside, the central portion (10a) protruding further in the direction of the free end of the insert die (1) in the axial direction of the latter than the circumferential portion (10b) so that the cross-section of the insert die (1) narrows in the direction of its free end, at least in the circumferential portion (10b) of its end side (10).
9. The device according to Claim 8, characterized in that the bottom (4a) of the mould cavity of the moulding tool (4) has a substantially planar extension or is on its part made approximately in the form of a trough and has a circumferential region extending from a central region on the circumferential side obliquely upwards, but the axial distance between the lowest point of the central region of the bottom (4a) of the mould cavity (4) and the outer circumference of its circumferential region is smaller than the axial offset (V) between the central portion (10a) of the end side (10) of the insert die (1) protruding the furthest in the axial direction in the direction of the free end of the insert die (1) and the outer circumference (10c) of the circumferential portion (10b) of the end side (10) of the insert die (1).
10. The device according to Claim 8 or 9, characterized in that the cross-over (4c) between the lateral surface (4b) of the mould cavity of the moulding tool (4) and its bottom (4a) are rounded, the rounding having in particular a radius of at least 1 mm, preferably of at least 2 mm.
11. The device according to any of Claims 8 to 10, characterized in that the insert die (1) has a substantially convexly curved end side (10) with a flowing cross-over of its central portion (10a) into its circumferential portion (10b).
12. The device according to any of Claims 8 to 10, characterized in that the central region (10a) of the end side (10) of the insert die (10) is substantially planar in form, and the circumferential portion (10b) adjoining the latter radially on the outside is substantially conically narrowed or convexly curved.
13. The device according to any of Claims 8 to 12, characterized in that - at least the circumferential portion (10b) of the end side (10) of the insert die (1), in particular both the circumferential portion (10b) and the central portion (10a) of the end side (10) of the insert die (1), and/or - the lateral side (11) of the insert die (1) is/are provided with suction openings (13, 12) which can be connected to a negative pressure generator.
14. The device according to Claim 13, characterized in that the negative pressure generated by the negative pressure generator can be switched on or off, the negative pressure generator in particular also being designed to generate a positive pressure that can likewise be switched on or off.
15. The device according to Claim 13 or 14, characterized in that at least some suction openings (13) extend substantially in slot form over at least part of the circumferential portion (10b) of the end side (10) of the insert die (1) from the central portion (10a) of the end side (10) of the insert die (1) with the radial extension direction component on the outside.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014005659.7A DE102014005659B3 (en) | 2014-04-17 | 2014-04-17 | Process for transferring bottom labels and banderole labels into an injection mold and device suitable therefor for producing injection-molded parts provided with bottom labels and banderole labels |
DE102014005659.7 | 2014-04-17 | ||
PCT/EP2015/000767 WO2015158423A1 (en) | 2014-04-17 | 2015-04-13 | Method for transferring bottom labels and wraparound labels into an injection mould and device, suitable for this purpose, for producing injection-moulded parts provided with bottom labels and wraparound labels |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ726160A true NZ726160A (en) | 2020-12-18 |
NZ726160B2 NZ726160B2 (en) | 2021-03-19 |
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EP3131730A1 (en) | 2017-02-22 |
CA2945844A1 (en) | 2015-10-22 |
JP6576950B2 (en) | 2019-09-18 |
BR112016024044B1 (en) | 2021-07-27 |
US20170036380A1 (en) | 2017-02-09 |
RU2016144760A (en) | 2018-05-18 |
EP3131730B1 (en) | 2018-04-11 |
BR112016024044A2 (en) | 2017-08-15 |
RU2683085C2 (en) | 2019-03-26 |
SA516380095B1 (en) | 2020-10-14 |
US10391688B2 (en) | 2019-08-27 |
CA2945844C (en) | 2022-04-12 |
AU2015246383B2 (en) | 2019-01-31 |
MX2016013458A (en) | 2017-05-04 |
WO2015158423A1 (en) | 2015-10-22 |
AU2015246383A1 (en) | 2016-11-24 |
CL2016002639A1 (en) | 2017-06-02 |
JP2017514724A (en) | 2017-06-08 |
RU2016144760A3 (en) | 2018-10-19 |
DE102014005659B3 (en) | 2015-05-21 |
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